CVE-2024-46798

Local freed-memory read via stale runtime pointer

Published Sep 18, 2024 · Updated Aug 5, 2026

Use-after-free in the ASoC DAPM subsystem of Linux allows local users to access freed kernel memory during system suspend. The cleanup path frees an snd_soc_pcm_runtime object without clearing substream->runtime, so snd_pcm_suspend_all later reads the stale pointer. Reproduction requires system suspend with an affected ASoC runtime; the published trace uses a KASAN-instrumented kernel and documents a one-byte invalid read.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the ASoC DAPM subsystem of Linux allows local users to access freed kernel memory during system suspend. The cleanup path frees an snd_soc_pcm_runtime object without clearing substream->runtime, so snd_pcm_suspend_all later reads the stale pointer. Reproduction requires system suspend with an affected ASoC runtime; the published trace uses a KASAN-instrumented kernel and documents a one-byte invalid read.

The record

CVE
CVE-2024-46798
Published
Sep 18, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4
  2. Affected versionversion=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <3033ed903b4f28b5e1ab66042084fbc2c48f8624
  3. Affected versionversion=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <5d13afd021eb43868fe03cef6da34ad08831ad6d
  4. Affected versionversion=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <6a14fad8be178df6c4589667efec1789a3307b4e
  5. Affected versionversion=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <8ca21e7a27c66b95a4b215edc8e45e5d66679f9f
  6. Affected versionversion=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <993b60c7f93fa1d8ff296b58f646a867e945ae89
  7. Affected versionversion=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <b4a90b543d9f62d3ac34ec1ab97fc5334b048565
  8. Affected versionversion=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <fe5046ca91d631ec432eee3bdb1f1c49b09c8b5e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <3033ed903b4f28b5e1ab66042084fbc2c48f8624; version=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <5d13afd021eb43868fe03cef6da34ad08831ad6d; version=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <6a14fad8be178df6c4589667efec1789a3307b4e; version=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <8ca21e7a27c66b95a4b215edc8e45e5d66679f9f; version=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <993b60c7f93fa1d8ff296b58f646a867e945ae89; version=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <b4a90b543d9f62d3ac34ec1ab97fc5334b048565; version=a72706ed8208ac3f72d1c3ebbc6509e368b0dcb0 <fe5046ca91d631ec432eee3bdb1f1c49b09c8b5e

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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